Safety device for trocars and surgical instruments therefor.

摘要

A safety locking device (10) is provided for assuring proper matching relationship between a surgical instrument (14) and a trocar guide tube housing (18). The safety device is slidably mounted on the elongated portion of the surgical instrument, and includes locking fingers (22) with locking tabs (24) projecting radially inward to engage a circumferential groove (26) in the surgical instrument elongated portion. The locking fingers include a camming surface (28) to engage a corresponding camming surface (30) associated with an appropriate guide tube housing. As the surgical instrument is inserted into an appropriate guide tube housing, the guide tube housing camming surface engages the locking finger camming surface to disengage the locking tabs from the circumferential groove and permit complete insertion of the instrument. A sleeve (34) surrounds the locking fingers to prevent tampering, and an unlocking tool (64) is provided.